Auto Tele-Seimar 135mm f/2.8
Auto Tele-Seimar 135mm f/2.8 is a manual focus prime lens for full frame cameras.
Has 6 aperture blades, this number of blades are commonly used. Having rounded blades provides out of focus circle shape closer to a circle. Bright lens thanks to the high aperture value
55 mm lens filter diameter, commonly filter size, you have plenty of possibilities. Weights 365 grams so plan ahead, carry only if really necessary.